Possible Clues:

• 'Concentrated verbally, perhaps (7)'
• 'Concentrated in past, present or future (7)'
• 'Acute, extreme (7)'
• Concentrated in time for a grammar lesson
• Set in nine but begins in ten
• In an extreme degree
• Earnest part of speech prefixed by one note
• Fierce — deep
• Vivid impressions at first on new future, for example
• Deeply felt - extreme